A sinusoidal wave traveling in the positive x direction and has an amplitude of 8 cm, a wavelength of 4cm cm, and a frequency of 20.0 Hz. The transverse position of an element of the medium at t = 0, x = 0 is y = 4 cm, and the element has a positive velocity here. The time expression of the wave is: A-y = 0. 08 sin ( 50πχ-40πt +-) | 5n) B- y = 0.08 sin (50nx – 40nt + ) C– y = 0. 08 sin(50nx + 40nt - D- y = 0.08 sin (50nx + 40nt + E- y = 0.08 sin (50nx + 40nt 3
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